Abstract
Experimental methods for determining the limiting activity coefficients that are relevant in the approbation of theoretical approaches to solve the problem of gas solubility in a liquid are described. Traditional methods realized on a single installation are preferred in order to obtain consistent information. The necessity of additional purification of problem samples of the studied substances is demonstrated. A developed and created low-temperature laboratory column is presented, for which the degree of separation in cases with a coil and packed rectification section, as well as the relative fugacity of the pentane — fluorodichloroethane test mixture are found. Based on the conducted experiments, it can be concluded that it is possible to efficiently use both a coil and a packed column for the purification of substances and enhancement of the measuring effect, and the possibility of obtaining reliable data on limiting solubility from the experimental installation. The gravimetric static method for measuring the concentration of the components in binary mixtures is promising for the study of little-researched and rare substances and is applicable in combination with a small volume cell.
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